Siemens SIPROTEC 4 7UT6 Series User Manual

Address 1115 PoleOpenCurr.S5 for side for side 1 of the main protected object, of
the main protected object,
Address 1121 PoleOpenCurr.M1 for measuring location 1,
Address 1122 PoleOpenCurr.M2 for measuring location 2,
Address 1123 PoleOpenCurr.M3 for measuring location 3,
Address 1124 PoleOpenCurr.M4 for measuring location 4,
Address 1125 PoleOpenCurr.M5 for measuring location 5.
i
i
NOTE
When setting the residual current parameters for the sides of three-phase protected objects, the following
order must be followed:
1. Determination of the ratio Ι
P
(primary current of transformer) / Ι
Ns
(rated current of the side)
2. As a minimum setting for parameters 1111 to 1115, this results in a value of 0.04 Ι
P
/ Ι
NS
Example:
I
P
= 3000 A, I
NS
= 1128 A → Ι
P
/ Ι
NS
= 2.66
PoleOpenCurr.S1 (Min.) = 0.04 · 2.66 = 0,11
If a value smaller than described under 2 is set (faulty configuration), this fact will be detected in a plausibility
check and reported, and the differential protection will be blocked.
If parasitic currents (e.g. through induction) can be excluded when the circuit breaker is open, these settings
may normally be very sensitive. Otherwise the settings must be increased correspondingly. In most cases the
setting can be the same for all addresses displayed.
However, note that current summation measuring errors may occur on the sides which are fed by multiple
measuring locations.
In the
1-phase busbar protection, you can set such an open-pole current for each of the up to 9 feeders
(7UT613 and 7UT633 for 1-phase connection with or without summation CT) or 12 feeders (7UT635 with or
without summation CT) of the busbar. The maximum range of possible addresses includes:
Address 1131
PoleOpenCurr I1 for feeder 1,
Address 1132 PoleOpenCurr I2 for feeder 2,
Address 1133 PoleOpenCurr I3 for feeder 3,
Address 1134 PoleOpenCurr I4 for feeder 4,
Address 1135 PoleOpenCurr I5 for feeder 5,
Address 1136 PoleOpenCurr I6 for feeder 6,
Address 1137 PoleOpenCurr I7 for feeder 7,
Address 1138 PoleOpenCurr I8 for feeder 8,
Address 1139 PoleOpenCurr I9 for feeder 9,
Address 1140 PoleOpenCurrI10 for feeder 10,
Address 1141 PoleOpenCurrI11 for feeder 11,
Address 1142 PoleOpenCurrI12 for feeder 12.
Finally, it is also possible to monitor the residual currents at the auxiliary measuring locations. These residual
currents are needed by the dynamic cold-load pickup feature of the earth overcurrent protection, if no side or
measuring location is assigned to the earth overcurrent protection. The maximum range of possible addresses
includes:
Address 1151
PoleOpenCurrIX1 for further measuring location 1,
Address 1152 PoleOpenCurrIX2 for further measuring location 2,
Address 1153 PoleOpenCurrIX3 for further measuring location 3,
Address 1154 PoleOpenCurrIX4 for further measuring location 4.
Functions
2.1 General
SIPROTEC 4, 7UT6x, Manual 87
C53000-G1176-C230-5, Edition 09.2016

Siemens SIPROTEC 4 7UT6 Series Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7UT6 Series
Category	Protection Device
Language	English